Trialkyl thiphosphates. Selective extractants for silver and mercury

Autor:	John A. Dean, T. H. Handley
Rok vydání:	1960
Předmět:	Partition coefficient chemistry.chemical_compound Aqueous solution Chemistry Nitric acid Reagent Partition equilibrium Inorganic chemistry chemistry.chemical_element Phosphoric acid Analytical Chemistry Thiophosphate Mercury (element)
Zdroj:	Analytical Chemistry. 32:1878-1883
ISSN:	1520-6882 0003-2700
Popis:	Triiso-octyl thiophosphate and tri-n-butyl thiophosphate, neutral esters of monothiophosphoric acid which contain an isolated P = S group, are highly selective extractants for silver and mercury(II) ions in nitric acid medium from the 35 elements tested. The extracted species are formed rapidly and the partition is easily reversed. From aqueous solutions 6M in nitric acid and for a 0.67M solution of the reagent in carbon tetrachloride, the partition coefficient at room temperature for silver exceeds 100; for mercury it is 90. The influence of a wide range of nitric acid, reagent, and silver concentrations, and the effects of temperature, diverse acids, and salting agents upon the partition equilibrium were investigated. Structures are postulated for the solvates formed between the reagent molecules and nitric acid and the metal nitrates. (auth)
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8a796f42d22e148becc079efb2490934 https://doi.org/10.1021/ac50153a049 Zobrazit plný text záznamu